GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Wheel Speed Sensor (WSS) - RF


Object Number: 239081  Size: LF
(1)Wheel Speed Sensor (WSS) - RF
Figure 2:

Pressure Modulator Valve (BPMV) - LF and RF


Object Number: 231739  Size: LF
(1)Brake Pressure Modulator Valve (BPMV) - RF
(2)BPMV - LF
Figure 3:

Wheel Speed Sensor (WSS) - LF


Object Number: 239939  Size: LF
(1)Wheel Speed Sensor (WSS) - LF
Figure 4:

Wheel Speed Sensor (WSS) - LR and RR


Object Number: 239938  Size: LF
(1)Wheel Speed Sensor (WSS) - LR
(2)WSS - RR